/Engine/Source/Runtime/Engine/Classes/Engine/Engine.h
Wrapper from int32 to uint64
void AddOnScreenDebugMessage ( int32 Key, float TimeToDisplay, [FColor](API\Runtime\Core\Math\FColor) DisplayColor, const [FString](API\Runtime\Core\Containers\FString) & DebugMessage, bool bNewerOnTop, const FVector2D & TextScale )